DevExpress绘制多重坐标图形

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
using DevExpress.XtraEditors;
using DevExpress.XtraCharts;
using DevExpress.Utils;
using System.Data.SqlClient;

namespace TreeList_test
{
    public partial class XtraForm2 : DevExpress.XtraEditors.XtraForm
    {
        public XtraForm2()
        {
            InitializeComponent();
        }

        private void XtraForm2_Load(object sender, EventArgs e)
        {
            
            DataTable dt = CreateData();
            this.gridControl1.DataSource = dt;
            CreateChart(dt);

        }
        //准备数据内容
        private DataTable CreateData()
        {
            #region 数据库表结构
            /*
              emp：员工表

              empno：       员工编号；  
              ename：       员工名字；  
              job：         职位； 
              mgr:          上司； 
              hiredate：    入职时间；
              sal：         基本工资；  
              comm：        补贴；      
              deptno：      所属部门编号；
            */
            #endregion
            using (SqlConnection con=new SqlConnection("Data Source =.; Initial Catalog = test_10_23; User ID = sa; Password = 123456; Connection Timeout = 10"))
            {
                string sql = "select empno,sal,deptno from emp";//查找所有员工的薪水
                SqlDataAdapter sda = new SqlDataAdapter(sql, con);
                DataSet ds = new DataSet();
                sda.Fill(ds);
                return ds.Tables[0];
            }
        }
        //创建图表图形
        private void CreateChart(DataTable dt)
        {
            #region Series
            //创建几个图形的图像
          
            Series series1 = CreateSeries("员工编号",ViewType.Line,dt,0);
            Series series2 = CreateSeries("员工薪水", ViewType.Line, dt, 1);
            Series series3 = CreateSeries("所属部门编号", ViewType.Line, dt, 2)；
            #endregion
            List<Series> list = new List<Series>() {series1,series2,series3};
            chartControl1.Series.AddRange(list.ToArray());
            chartControl1.Legend.Visibility = DefaultBoolean.False;
            chartControl1.SeriesTemplate.LabelsVisibility = DefaultBoolean.True;

            for (int i = 0; i < list.Count; i++)
            {
                //   list[i].View.Color = Color.Black;

                CreateAxisY(list[i]);
            }
        }
        //CreateSeries用于创建一个典型的图形
        //注意：Series.ArgumentScaleType=ScaleType.Qualitative这句代码必须设置，否则
        //默认会把"2005年1月"内容转换为 日期类型，显示不恰当的内容
        /// <summary>
        /// 根据需要创建一个图形展现
        /// </summary>
        /// <param name="caption">图形标题</param>
        /// <param name="viewType">图形类型</param>
        /// <param name="dt">数据DataTable</param>
        /// <param name="colIndex">图形数据的列序号</param>
        /// <returns></returns>
        private Series CreateSeries(string caption, ViewType viewType, DataTable dt, int colIndex)
        {
            Series series = new Series(caption, viewType);
            Type typeH = dt.Columns[0].DataType;
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                // var argument = Convert.ChangeType(dt.Rows[i][0], typeH);//参数名称
                //  var value = Convert.ChangeType(dt.Rows[i][colIndex], typeof(float));//参数值
                string argument = dt.Rows[i][0].ToString();//横坐标，可根据自己需求设置
                var value = Convert.ChangeType(dt.Rows[i][colIndex], typeof(double));
                series.Points.Add(new SeriesPoint(argument, value));
            }
            //必须设置ArgumentScaleType的类型，否则默认会转换为日期格式，导致不是希望的格式显示
            //也就是说，显示字符串的参数，必须设置类型为ScaleType.Qualitive
            series.ArgumentScaleType = ScaleType.Qualitative;
            series.LabelsVisibility = DevExpress.Utils.DefaultBoolean.True;//显示标注标签

            return series;
        }
        /// <summary>
        /// 创建图表的第二坐标系
        /// </summary>
        /// <param name="series">Series对象</param>
        /// <returns></returns>
        private SecondaryAxisY CreateAxisY(Series series)
        {
            SecondaryAxisY myAxis = new SecondaryAxisY(series.Name);
            ((XYDiagram)chartControl1.Diagram).SecondaryAxesY.Add(myAxis);
            ((LineSeriesView)series.View).AxisY = myAxis;
            myAxis.Title.Text = series.Name;
            myAxis.Title.Alignment = StringAlignment.Far;//顶部对齐
            myAxis.Title.Visibility = DefaultBoolean.True;
            myAxis.Title.Font = new Font("宋体", 9.0f);
            Color color = series.View.Color;//设置坐标的颜色和图标线条颜色一致

            myAxis.Title.TextColor = color;
            myAxis.Label.TextColor = color;
            myAxis.Color = color;

            return myAxis;
        }
    }
}